Stereopticon-slide carrier



L. e. SHRYOCK, STEREOPTICON SLIDE CARRIER.

APPLICATlON FILED OCT-1'9, 192b- 5 m y h w Z. 4 a DO D E U W e MW/I. 5w 0 w Q o L- G. SHRYOCK.

STEREOPTIOON SLIDE CARRIER.

v APPUCATON FILED OCT- 19] 1920- 1,414,488.

Patented May 2, 1922.

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L. G. SHRYOCK.

STEREOPTICON SLIDE CARRIER.

APPLICATION map OCT. 19. 1920 l 2. 93 1T r 2 5 Wm Mu aw W H B LIU a P INVEN OR A I'TORNEY LEWIS e. SHRYOCK, or

CLARENDON, ARKANSAS.

'msmmomme CARRIER.

App1ication filed October 19, 1920. Serial No. 417,9235.

To all whom it ma concern: Y

Be it known that I, Lnwrs G. SHRYOCK, a citizen of the United States, residing at Clarendon, in the county of Monroe and State of Arkansas, have invented new and useful Improvements in Stereopticon-Slide Carriers, of which the following is a specification. v

This invention relates to attachment for motlon'plcture pro ectlon machines and has for its object the provision of a device for any waiting or interruption;

An important object is the provision of a device of this character in which all the slides are mounted in separate carriers which are connected totorm an endless chain, this chain being moved by a suitable motor to bring the successive slides before. denser lens. 7 7

Another object is the provision of a device ofthis character having a novel motor driven means for moving the slide carriers'step by step so that the matter thereon will be thrown on the screen'for the desired length of time.

Another object is the provision of a device of this character'which has a switch mechanism associated therewith'and automatically closed when the lamp house of the projection machine is shifted to project thestereopticon views.

An additional object is the provision of a device ofthis character which will be comparatively simple and inexpensive in construction, whichwill be a great time and the conlabor saver for the operator, which will eliminate objectionable waiting by the spectators While difierent adjustments and manipulations are gone through with by the operator while the slides are placed'in and re: moved from operative position in the ordinary manner, the device having the further advantage of leaving the operator free to at-.'

tend to other matters',

WVith the above and other objects and advantages in View, the invention consists in Specification of Letters Patent;

Patented May 2, 1922.

the-details of construction to be hereinafter more fully described and claimed and illustrated 'in the accompanying drawings in which-' a motion picture projection machine. showing my device in position thereon,

Figure 2 is an enlarged elevation of my device detached, 7 Figure 3 is a detail sectional view taken longitudinally of the guides,

Figure 4 is a cross sectional view through the guides,

Figure l is an elevation of a portion of Figure 5 is a detail perspective view of.

one of the slide carriers and portions of the adjacent slide carriers,

Figure 6 is a detail sectionalview on the line 66 of Figure 2,

the operating end of the actuating lever; Referring more particularly tothe'drawings, the letter A designates at motionpicture pro ectlon machine in general, B des-- ignates the lamp housethereof, and designates the condenser lens. The machine'of rod Di y r,

In carryingout my invention I provide a frame '10 provided with an arm 11 which carries at its end a' clamp 12uengageable Figure 7 is a detail perspective view-of course includes among many other parts the.

such position that a hole 15in the frame, will register with the condenser lens .0. The

portion of the frame at the hole 15 is com-' paratively' long and is formed at its edge with a retaining fian e '16. At a point spaced back from the edge the frame is provided with an oifset slottedguide 17, for a purpose-to be described. At the upper portion of the frame is formed an arm 18 upon which is journaled a guide roller 19' square g,

in cross section and having flanges 20. At

the rear portion of the frame is formed an I extension 21 upon which is journaled a flanged guide roller '22. V

The numeral 23 designates one of the slide carriers which is formed of sheet metal'having retaining flanges 24 at its side edges and having a retaining spring 26 at one end for holding a slide against displacedisposed between the cars 28' of the next:

successive carrier, as clearly shown, and the carriers are .pivotally connected by pins 29 which extend outwardly beyond the carrier, as clearly indicated, for engagement with the slotted guide 17. When all the carriers are'connected they, withthe strips 27, form an endless chain and it is readily apparent that the number of carriers used may vary considerably. The chain formed of "the carriers is trained about the-roller 19 and the 'rol'ler. 22 with the pins 29 of several adjacent carriers is disposed within the slotted guide 17 and the free endsengaged by the flange 16. g i e In order to effect movement of the chain of carriers I provide a gear30 journaled on the extension 21 and driven by. a motor 31 through-a train of gears 32. Carried by the gear 30 near the edge thereof is a small roller Pivoted upon the extension 21 is a lever arm 34 urged toward thegear 30-by' a coil spring 35 and formed with a 'projec.

tion 36 in the path of travel of the roller 33. At'its free end the arm 34 carries a springpressed pawlv 37 which is engageable-with the successive pins'29 of the carriers for operate at such a speedthat each. slide will Q: remain before the opening :15 the desired length of time before it is moved by the lever ,34, It should be stated thatv other guide rollers 38 may be provided adjacent the ends of the guide 17 to'insure proper "movement of the carriers.

The device is associated with a motion picture mach ne in the following manner:

The screwsfholding the condenser hood ontlie lamp house of the motion picture machine areremoved and the hood is connected to the lamp house at the operators side thereof, leaving a sufliciently wide, space betweenthe hood and the lamp house for a portion of the upper free corner of each slide 'carrier'to pass. The framelO isthen bolted onto the rod D by means of the clamp 12 and the rod 13 is secured to the floor, any

suitable adjustment being provided at the point of connection ofthe rod 13 withfthe "frame.

It is preferable to provide a con tact 3901i the sliderod ofthe lamp house and another contact 40 on the lamp house,

these contacts being connected in circuit W1lZl1 a sultable source of current to the motor 31 so that when the operator pushes the lamp house over to the stereopticon side'of the motion picture machine, that is the side at which 'my device is located, the two contacts wilhengage and complete the circuit so that the motor will be immediately set in operation.

the roller 88 will engage and force down 7 7 As the motor rotates the gear 30 will ro vtate and once in every rotation of the latter the lever arm 34c, the pawlon which will en. gage a pm 29 and'move the carrier chain one step. i/Vhichever-slide is then before From the foregoing description andi a study of the drawings it will beapparent" that I have thus'provided a simply con-j, structed and automatically operated device for holding and causing to be projected any desirednumber, within reasonable limits', of

stereopticon slides, the device being particularly advantageous in pro ecting advert s ng As the roll er 83 passesv matter of all 'kinds onto the screenand at the same time requiring no attentionon the part OE tllQOPGIittOI so t-hat he will be free, a to prepare for running the next roll of film. I While I have shown and described: the

preferred embodiment. of my invention, it n v I lS OjE course to be understood that I reserve moving themfstep by step. It is'of course to be understood that the motor 31 must the, right to .'make such changes in the. form,

will not depart from the spirit of the invention or the scope ofthe subjoined clainis, r

construction, and arrangement of partsas;-

Having thus described invention, 1

claim .1. A motionpicturefmachine attachment comprising a frame, guide rods carried by the motion PlClSllIQ machine and slidably supporting said frame, guide rollers onsaid.

frame, a plurahtyof slide carrier's connectedf 1n endless chain formatlon and trained about said rollers, electricmotor operating means for driving saidchain steploy stepflty contact element carriedbysaid guide rod, a secondcontact member carried by tlie frame, said contact being interposed in circuit with a source of current and with said electric motor, whereby when said frame is shifted to bring the slide carriers in registration.

with the'condenser lens of themotion picfra1ne,'a plurality of slide carriers connected;

in endless chain "formation an dtrained about said rollers and engaged within said the jcharacter described guides, a projection on each carrier, and motor driven means successivelylengaging said projections whereby to move the carriers step by step, said means comprising a lever arm pivoted upon the frame and carrying a pawl at its free end engageable with the successive projections and means for intermittently moving said lever arm comprising a rotary member, a roller on said rotary member, and a projection on said lever arm engageable by said roller.

3. In a device of the character described, a slide carrier of endless chain formation comprising a plurality of units each formed as a body having its side edges formed with retaining flanges and one end provided with a slide retaining clip, reinforcing strips at the other end of the body, one end of the strips being outwardly offset to define spaced ears receiving the ends of the strips of the next adjacent carrier, and pivot pins passing through said ears and through the strips of the adjacent carrier. i

4. In a device of the character described a lide carrier of endless chain formation comprising a plurality of units each formed as a body having its side edges formed with retaining-flanges and one end provided with a slide retaining clip, reinforcing strips at the other end of the body, one end of the strips being outwardly offset to define spaced ears receiving the ends of the strips of the LEWIS G. SHRYOOK. 

